The BPX 2-inch double-wall brazed plate heat exchanger from Bell & Gossett, a Xylem brand, offers a high level of leak protection, safety and thermal efficiency for commercial building and water heating applications. Its double-wall construction provides dependable protection of freshwater streams for cooling of oils and refrigerants — not just heat transfer surface. It delivers a maximum flow rate of 230 gpm, and meets evolving plumbing code requirements for domestic water heating. It provides four dedicated leak detection ports and complete double-wall plate design, providing air vent leak paths to detect leaks. A true dedicated air gap facilitates leak detection should a leak occur, ensuring system control. Stainless steel plates are vacuum-brazed together to form a durable, integral piece that can withstand high pressure and temperatures. 847/966-3700; www.bellgossett.com.